From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 311D6C54E58 for ; Mon, 25 Mar 2024 10:31:57 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id B0BA06B008A; Mon, 25 Mar 2024 06:31:56 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id ABCA06B008C; Mon, 25 Mar 2024 06:31:56 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 95CBA6B0092; Mon, 25 Mar 2024 06:31:56 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id 81D836B008A for ; Mon, 25 Mar 2024 06:31:56 -0400 (EDT) Received: from smtpin07.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay02.hostedemail.com (Postfix) with ESMTP id 434AC120CE8 for ; Mon, 25 Mar 2024 10:31:56 +0000 (UTC) X-FDA: 81935195832.07.6BCE87E Received: from mail-lf1-f41.google.com (mail-lf1-f41.google.com [209.85.167.41]) by imf03.hostedemail.com (Postfix) with ESMTP id 599922000E for ; Mon, 25 Mar 2024 10:31:54 +0000 (UTC) Authentication-Results: imf03.hostedemail.com; dkim=pass header.d=gmail.com header.s=20230601 header.b=gRHjkaXh; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (imf03.hostedemail.com: domain of ubizjak@gmail.com designates 209.85.167.41 as permitted sender) smtp.mailfrom=ubizjak@gmail.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1711362714; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=Dbdkld9EIn5mxEib8xVsWINte3+ADKN1z1yj3vCs6Rg=; b=l5eBagKMWpik5w3vmWaBFVxQuRnhHT623z5+opFUcNK3JFdCQGO+mX/lSJxOEBHl2G0rgN hoADkvNjZx2TF9wQAWo/tfQSKgGTGsP4KjSIyMPoek+Gb9f6GbFEMVbyrtwE8PaEup8xWE 1H10RvYagkpYLa5fFKqvdpo3CXgY2mo= ARC-Authentication-Results: i=1; imf03.hostedemail.com; dkim=pass header.d=gmail.com header.s=20230601 header.b=gRHjkaXh; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (imf03.hostedemail.com: domain of ubizjak@gmail.com designates 209.85.167.41 as permitted sender) smtp.mailfrom=ubizjak@gmail.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1711362714; a=rsa-sha256; cv=none; b=bYRirnT98hxZ9y5ajzlp/NjsugQRFg0B/SwbADb9P9fR+9wPodMQlVOUS74VJ+scFydPVK CzWsRiBkvHLnvuOHQbb3bwNBtBN4b/q9Zmu0VKhxyKC1BN5svdvI7EC4xsdPk6Fy2e4y81 gia9j7qtgfrFK/yyAKRMPs8c5bXUPSg= Received: by mail-lf1-f41.google.com with SMTP id 2adb3069b0e04-5148ea935b8so4761193e87.1 for ; Mon, 25 Mar 2024 03:31:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1711362712; x=1711967512; darn=kvack.org; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:from:to:cc:subject:date:message-id:reply-to; bh=Dbdkld9EIn5mxEib8xVsWINte3+ADKN1z1yj3vCs6Rg=; b=gRHjkaXhEAqoFa/jtbqtSYnJaPqirs3CQChbvgv1qoiVGNkv9Yde3YMqzuIWRovrzK ffl1m88W7utsIlcR2BiDH020geH+EBwuavkhC5oJCWAxZumFBb2WstWNvc1n7ox79d9P NVSzmhBT1LMKhBorcBFQJRC+27UEu3a+ZARteoZ0Q5vIBpg373Kl54euWH4GNR7nNYLt 8wRZ01oNxixhVwaRyq51DT3I7LswjeP6CUsRJJkD7GnpaaBDy/j6pL9pTk03323d608v gS5rJbUCTXlj2xTX88dSWYR6kaxS8Ll0f7L0+k9XtFtXjR0I/ib+UBvqaxG6hfx011Mq /KsQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1711362712; x=1711967512; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=Dbdkld9EIn5mxEib8xVsWINte3+ADKN1z1yj3vCs6Rg=; b=k5VkKJf5K8ZO5lIA5ArYQzL8ZEq4RVUbcRWKQLpzwhw/VPqXo2Mw07YqE58Fn5jQfJ sSr61tRwsf1yPwXaVyjc0MLOHfDzvsnypfXGl+P6lIeOpVN8eYjG016mRqEqNuvoL89s FfmB3P+8tfWtLGsY2pdJ09QHMmhKB0XvUT3ohOOxmnKJAZ4TYomyS3pPPOUXNEbMrO2y EL0EeQY3JGRPdQcHfeLvhTgISARlDdqU97kL+tQju/odG9HdMhzW/l0hEgXc8j9tYngU Y1WuySk5h/5s8qDII2p0ntrs954aZEAAhP+RdPNCjWTcdiP9ITqk/IbkPc/ETGCivtmH Okzg== X-Forwarded-Encrypted: i=1; AJvYcCW4ZQbpXmDKjxRXwl7lmGDHoiOLjof3JjqjA5I61bx04t/qBmkviNRBVNpZnPXe5DXSQAoye+OCO2StxOhrokn8x00= X-Gm-Message-State: AOJu0Yx5pg4F0y+90HQN2/pnt9qOTP5BhsU5CVUt9isTJoQOUeZVlNPH +0WfAnQUETcNWrRTi9XmpW1I5t+8jdr/s4ni9hEGPnFyCkUXqqPhfajDPVjm+26w3SgfOuQKzud 0RzNqroW7cStWI0uI/kbJP5BCBfo= X-Google-Smtp-Source: AGHT+IEZrrW3vOVJicf/LJWc1jJKfh8xwURLN0NHHA7XVSrGGSYNh2jxYmNV4jLkP8w4dTUVhg8Kf7G/bCr+8tPPfmE= X-Received: by 2002:a2e:a714:0:b0:2d6:dac4:7d4f with SMTP id s20-20020a2ea714000000b002d6dac47d4fmr1068288lje.4.1711362712188; Mon, 25 Mar 2024 03:31:52 -0700 (PDT) MIME-Version: 1.0 References: <202403251658.8e92a8bc-lkp@intel.com> In-Reply-To: <202403251658.8e92a8bc-lkp@intel.com> From: Uros Bizjak Date: Mon, 25 Mar 2024 11:31:40 +0100 Message-ID: Subject: Re: [linus:master] [x86/percpu] ca42563486: BUG:unable_to_handle_page_fault_for_address To: kernel test robot Cc: oe-lkp@lists.linux.dev, lkp@intel.com, linux-kernel@vger.kernel.org, Ingo Molnar , Nadav Amit , Andy Lutomirski , Brian Gerst , Denys Vlasenko , "H. Peter Anvin" , Linus Torvalds , Peter Zijlstra , Thomas Gleixner , Josh Poimboeuf , linux-mm@kvack.org Content-Type: multipart/mixed; boundary="0000000000008ad00d061479ae18" X-Rspamd-Queue-Id: 599922000E X-Rspam-User: X-Rspamd-Server: rspam04 X-Stat-Signature: gsjudgkk5x1i1bxq7ruqqeooxm8fyx3p X-HE-Tag: 1711362714-493838 X-HE-Meta: U2FsdGVkX19SXg9m2AFvkQmYLE76lOs/fCORzSGfrVn8RuiQCoScdw4uYBAeMyDXwwJX03IS4gxR+h8jCFzDIyy+pwR2UQ1iPYu/vU2SBOwFARgV+5cm17bOD62qp4/+TgkaCgHBAvYFxYh1aEpKegFNy+/c2lQnI3EU48ZqjyJ0U1x8AaMSTVlUDDQZUKCljgda2KiSjcnANBERK01zF6Y96cr0irjj0HVZIgEyx5bYu+9ajpq73a7IiNVdLtkaABusEE+FvssgLDly+IPycV4jzB1OCIMZwH41QFCW31cQNHf51z8uLP3LHYSdImpjfeTYiG/at3PyKDYrVlZMJuWmf0skpIG7Eg0kAiKzrWHzuWlxiTYtYHRxul0jEWTvq1OjKEehVV9nZfbWVxARmAAF7sL4L8eoa/euh8H95Fvq46MIBfjYbPofDm0igYv1CMVtFdzjCxuxgQyAIhEe4mj2TtmGUQTCLYYx+dSz0HnZ6kBTbVRDjajqrTU0eejbqAN2+zZcXunJ/LEKE4502qfU3PyANqBn9tbWYwRlfRoBPDczLXzf0wcm0tC5KDEtKpxULGLNjiA/gvk5+AXBAa4wpUrzZW2PQ3AtnolJ1GtDC/zhzoSGva6zne+9uHAZXGzht1P2FxNUnS24uF1+76lfwys4yaOqXzzoNQzI2k4qEiWKcnVzxMR8/1RcghJpYCCAv6NsPWkIf9YsKeEzU24mOImVPlltgT+Up+evqLVBgg4AFVsiRWuV0SPyQzFOhA6sgKVqlJgfAlav/XTrcQKu1f9MxV2H2KLTwdG5ft8xU3O/ss2tTqAt2hrJn5h2cFH9MOPgwxn2BMLYAxJroIROxDwYZIpGk8CDEJ/D2SvMO1V20a7j+r3KYatTc7HewZwnN6G8KxVz/UzVb6GZTXkOeb8C7btIpbMKTET16Z3V4N4mUFqC1XuaRCR+cpEagAwRrLdZAAEeeljNFDp 9vOeBmoX cI3eM603kZ35J4EKuyjEyDJiK8a3MuRF3pDzP+ydxF+Sh1SrgmEVSbWblJlQ5cE+ZUqKxtLMSXdja49vB33XqvBDqb0b3YsLRfgMeo69+3O5OraX81a1ZalSacYYw4tHw+D25CPCcpwsCiTmVVQpRaDjxqOSPv7dgyeWjxTH4I7oiXcq+YGw5lhDQKtJwpyL2ZFQrvRe585+etlPVYQcYnPMCKDhDQxleAFyUCsrof82FncOvTaI1rBjnkjN4kwnnrpcbjmQospU8CjEwfn4cC1ddz8bUl6vomrTiH+jfNu6wTviSKmkCjTOOt3fixOuGUeXLILbmtLJPfe8YHG5hS26ahuyYb8j9lRYutjWCwqubeK8v7x4S5bPVXVs9/jeOVvEPax3/r/bBN/BnUZTklfcpCgHxC94M/lkUMV/0WPd1yTXWV0j3WxmE9BIJWpHxK071J8ZDtrmPVuMfAKQi4YZedY8WRvrCuJWsvxlwWiLzrvJAbTeSTfpB3wD/dX5I/97zlFn4Cb8fFlqTfGyX7EFx1RiR4jB3uNk1S2cs5/j4jS0ItJxesC6zNDUapu77xZlGg8K5psy2bnhrEK5zdeCTJceNcZtTVANhe4otSs+UcBMfekHUAUPZyrkDBiuLK2hRCfax1QsD6T3x6uii17BpfTzs6ZHPDv23caVThh6TfwStw0tF77qoQ5JdGB6OcxEjRv8OmiBEQqDWkRtvfTXC7VtEALgjfHuWIkSUGV/w106EhweUG3oYekhC5SY9SGmT X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: --0000000000008ad00d061479ae18 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Mon, Mar 25, 2024 at 9:50=E2=80=AFAM kernel test robot wrote: > > > hi, Uros Bizjak, > > we reported an early crash issue for this commit last Oct. > https://lore.kernel.org/all/202310071301.a5113890-oliver.sang@intel.com/ > > as you mentioned at that time > "It is KASAN that is not compatible with named address spaces [1]." > > now we noticed the commit is merged into mainline, and we observed a diff= erent > issue related with kcsan_setup_watchpoint. below detail report FYI. > > [1] https://lore.kernel.org/lkml/CAHk-=3Dwi6U-O1wdPOESuCE6QO2OaPu0hEzaig0= uDOU4L5CREhug@mail.gmail.com/ > Yes, it is the same issue, but with KCSAN. > Hello, > > kernel test robot noticed "BUG:unable_to_handle_page_fault_for_address" o= n: > > commit: ca4256348660cb2162668ec3d13d1f921d05374a ("x86/percpu: Use C for = percpu read/write accessors") > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master > > [test failed on linus/master b3603fcb79b1036acae10602bffc4855a4b9af80] > [test failed on linux-next/master 226d3c72fcde130a99d760895ebdd20e78e02cb= 5] > > in testcase: boot > > compiler: gcc-12 > test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 1= 6G We already have the candidate fix for GCC [1], the fix will be in gcc-13.3+= . [1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111736 Please find attached an emergency patch for mainline that disables named address spaces when KCSAN is enabled. I'll post a formal patch submission in a moment. The named AS will be re-enabled with KCSAN with a patch via -tip tree. Thanks, Uros. --0000000000008ad00d061479ae18 Content-Type: text/plain; charset="US-ASCII"; name="p.diff.txt" Content-Disposition: attachment; filename="p.diff.txt" Content-Transfer-Encoding: base64 Content-ID: X-Attachment-Id: f_lu6t4s5d0 ZGlmZiAtLWdpdCBhL2FyY2gveDg2L0tjb25maWcgYi9hcmNoL3g4Ni9LY29uZmlnCmluZGV4IDM5 ODg2YmFiOTQzYS4uNGZmZjZlZDQ2ZTkwIDEwMDY0NAotLS0gYS9hcmNoL3g4Ni9LY29uZmlnCisr KyBiL2FyY2gveDg2L0tjb25maWcKQEAgLTI0MzksNiArMjQzOSw4IEBAIGNvbmZpZyBVU0VfWDg2 X1NFR19TVVBQT1JUCiAJIyB3aXRoIG5hbWVkIGFkZHJlc3Mgc3BhY2VzIC0gc2VlIEdDQyBQUiBz YW5pdGl6ZXIvMTExNzM2LgogCSMKIAlkZXBlbmRzIG9uICFLQVNBTgorCSMgLWZzYW5pdGl6ZT10 aHJlYWQgKEtDU0FOKSBpcyBhbHNvIGluY29tcGF0aWJsZS4KKwlkZXBlbmRzIG9uICFLQ1NBTgog CiBjb25maWcgQ0NfSEFTX1NMUwogCWRlZl9ib29sICQoY2Mtb3B0aW9uLC1taGFyZGVuLXNscz1h bGwpCg== --0000000000008ad00d061479ae18--